package com.j.lemon.learn.basic.collections;

import java.util.HashMap;
import java.util.HashSet;

public class MapTest {
    public static void main(String[] args) {
        HashMap hashMap = new HashMap();
        HashSet set = new HashSet();

        System.out.println(128 & 5);
    }

    static final int hash(Object key) {
        int h;
        return (key == null) ? 0 : (h = key.hashCode()) ^ (h >>> 16);
    }
}
